«ALECITHAL» संबंधित इंग्रजी पुस्तके
खालील ग्रंथसूची निवडीमध्ये
alecithal चा वापर शोधा. इंग्रजी साहित्यामध्ये वापराचा संदर्भ देण्यासाठी
alecithal शी संबंधित पुस्तके आणि त्याचे थोडक्यात उतारे.
1
Text Book Of Embryology
possess only a negligible amount of yolk (alecithal). Thus the egg of highly
advanced mammals resembles the egg of primitive chordate, Amphioxus. The
alecithal condition of mammalian egg is due to the internal development of the
embryo.
Since there is no yolk, the egg is said to be alecithal. When the egg is released
from the ovary it is surrounded by three membranes namely, corona radiata, a
middle zona pellucida and an inner plasma membrane. The corona radiata is ...
3
Advanced Topics In Zoology
These are: 1) alecithal, 2) telolecithal, and 3) centrolecithal. The cleavages are of
the following two types: 1 ) holoblastic with complete division of the zygote and
blastomeres, and 2) meroblastic with incomplete division. 1) Alecithal eggs have
...
Human eggs are (C.B.S.E. 1991) (a) Alecithal (b) Microlecithal (c) Mesolecithal (d
) Macrolecithal 8. Fertilizes are emitted by (C.B.S.E. 1991, 97) (a) Immature eggs
(b) Mature eggs (c) Sperms (d) Polar bodies 9. How many sperms are produced ...
A. Egg types based on amount of yolk 1. Microlecithal eggs : The eggs containing
very small amount of yolk are called microlecithal (Toirey, 1970). These are also
called as alecithal (Kent, 1969) or oligolecithal (Romer, 1962; Balinsky, 1970).
6
Cell and Developmental Biology
These eggs are very small in size. Some embryologists described microlecithal
eggs as alecithal eggs or oligolecithal eggs or miolecithal (i.e. little yolk) eggs.
The eggs of Amphioxus , marsupials and eutherian mammals are of this type.
Dr. Sastry, Dr. Singh & Dr. Tomar, 2010
7
Comparative Chordate Anatomy: A Laboratory Text
Accompanying the postulated return of this telolecithal ancestral ovum to a nearly
alecithal condition, however, is no corresponding return to those simpler
developmental processes that characterize a primarily homolecithal egg.
Confusion ...
Comparative Chordate Anatomy
8
The Works of Francis Maitland Balfour, Volume II (of 4)
... of ova including aseries of typesof segmentation nearlyparallel to the
telolecithal group. This group takes its startfromthe alecithal ovum asdo the
telolecithal ova, and equally with these includes a series of varieties of
segmentation running.
Francis Maitland Balfour, 2014
Some embryologists described microlecithal eggs as alecithal eggs or
oligolecithal eggs or microlecithal (i.e. little yolk) eggs. The eggs of Amphioxus ,
marsupials and cuthcrian mammals are of this type. The mammalian eggs
contain so little ...
10
Encyclopedia of Ecology and Environmental Management
Many amphibians have eggs with a moderate amount of yolk and are called
mesolecithal; eggs of viviparous animals may contain little or no yolk and are
said to be alecithal. Some insects have a peculiar egg in which yolk is
concentrated in ...
